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The feasibility of small-size efficient tritium extractors from Pb-17Li is a key issue for the design of the tritium cycle and for the overall economy of the Next Step D-T fusion machines. The good thermomechanical properties of SiCf/SiC, its chemical compatibility with Pb-17Li, and the high hydrogen leak rates exhibited, suggest its potential use as a permeator material. A general dispersion model has been implemented numerically to obtain the column extraction efficiencies for a range of tritium dilution factors in the Pb-17Li and different alloy-bubbled gas hydrodynamic conditions. The first objective of this study was to design an ideal extractor using a SiCf /SiC membrane, employing known data of hydrogen interaction with the composite. Secondly, the present calculated efficiency was compared with the maximum efficiency of existing extraction columns. The critical feasibility issues for the construction of the proposed extractor have been tentatively identified.

Additional information

Authors: SEDANO L A,
Bibliographic Reference: EUR 18147 EN (1998) 26pp.
Availability: Available from CCR Ispra - Servizio Pubblicazioni
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